This one another favorite on mine, although not my top favorite!
I loved the storyline to this one. Great to see a storyline centred solely around Dr. Spencer Reid, and I can't wait to see more episodes like this one!
I thought it was also very nice to see J.J. have her baby, and it was very sweet when she made Reid the godfather! Lovely moments!
The case on its own was immaculate! Someone else did mention a lack of action, which was true, but I think the case more than compensated for that, with its sheer amazingness!
Keep it up, Criminal Minds, and I would highly recommend this oepisode!